JBO Thread Plug Gauge - UNEF Go-No/Go - Left Hand - 2B - 1/2 x 28 Face Mill Arbors accurate radii on curved surfaces

accurate radii on curved surfaces with reliable

it delivers consistent thread formation and clean thread profiles across materials

it provides improved wear resistance and greater cutting stability under demanding conditions

and a straightforward shank design helps you finish holes to tight tolerances with fewer passes

Its left-hand spiral flute and right-hand cutting deliver controlled material removal and consistent diameters

JBO Thread Plug Gauge - UNEF Go-No/Go - Left Hand - 2B - 1/2 x 28 Face Mill Arbors accurate radii on curved surfacesThe JBO Thread Plug Gauge is a UNEF Go No Go tool designed to quickly verify the accuracy of left hand threaded holes sized 1 2 x 28, within the 2B tolerance class. Its precise dimensions help ensure consistent results when inspecting hole size and thread fit, so you can trust every measurement in your quality checks. Ideal for engineers, machinists, inspectors, and buyers across manufacturing, automotive, and aerospace, this gauge enables fast,